In this image made from video, a group of people believed to be hostages kneel in the sand with their hands in the air at an unknown location in Algeria. An Algerian security official says de-mining squads searching for explosives found "numerous" bodies on Jan. 20 at a gas refinery where Islamic militants took dozens of foreign workers hostage. Ennahar TV, AP

Philippine citizens who were working at the sprawling oil field queue up at Philippine Immigration upon arrival Jan. 20 at the Ninoy Aquino International Airport in Manila. The Department of Foreign Affairs in a statement, said that 39 Filipino workers, out of the 52 accounted for following the Algerian hostage crisis, arrived after being evacuated from Algeria via Palma de Mallorca in Spain. The workers claimed they were hundreds of kilometers away from the hostage-taking site but were ordered evacuated. Bullit Marquez, AP

Algerian soldiers secure the airport in Ain Amenas, Algeria, before the departure of freed hostages on Jan. 19. Algerian special forces stormed the natural gas complex in the Sahara on Saturday to end the bloody four-day hostage standoff, the Algerian government said. Mohamed Kadri, AP

This undated photo provided by the family shows Frederick Buttaccio, who died in a terrorist attack at a natural gas complex in Algeria. AP

This April 19, 2005, file photo shows the Ain Amenas gas field in Algeria, where Islamist militants raided and took hostages Jan. 16. Kjetil Alsvik, AP

This image released on Jan. 19 by the SITE Intelligence Group and credited to the ANI Mauritanian news agency shows Abdul Rahman al-Nigeri, who reportedly led the hostage-taking operation at the BP oil facility in Ain Amenas, Algeria. ANI, AFP/Getty Images

Helge Lund, CEO of Statoil, answers questions from reporters on Jan. 19 as he arrives to visit the drop-in center in Bergen, Norway, which has been set up for relatives of people taken hostage in Algeria. The Ain Amenas natural gas complex is run by Sonatrach, the Algerian state oil company running the site along with BP and Norway's Statoil. Anette Karlsen, AP

Two British hostages identified only as Peter, left, and Alan, are seen after being released in a street of Ain Amenas, near the gas plant where they had been kidnapped. Anis Belghoul, AP

Britain's Secretary of State for Defense Philip Hammond, left, speak to the media with U.S. Defense Secretary Leon Panetta during a news conference at Lancaster House in London on Jan. 19. The U.S. and British defense chiefs said Saturday the hostage crisis in Algeria ended with more deaths, but that details remained unclear. Jacquelyn Martin, AP

An unidentified rescued hostage receives treatment in a hospital Ain Amenas, Algeria, in this image taken from television on Jan. 18. AP

Algerian special police unit officers guard the entrance of a hospital on Jan. 19 near the gas plant where hostages had been kidnapped by Islamic militants in Ain Amenas. Anis Belghoul, AP